var pers = []

pers.addperson = function(name,mail,mobil){
    this.push({Name:name,Mail:mail,Mobil:mobil});
}
pers.deletePerson = function(index){
    this.splice(index,1);
}

pers.addperson("Jens","jens@mail.com",87542132);
pers.addperson("Peder","Peder@mail.com",54613278);
pers.addperson("Hans","Hans@mail.com",486187546);
pers.addperson("Niels", "Niels@mail.com",87954612);

var tableContent = document.getElementsByTagName("td");
for(var i =0;i<tableContent.length;i++){
    if (i%2==0){
        tableContent[i].innerHTML=pers[i/2].Name;
        tableContent[i+1].innerHTML=pers[i/2].Mail;
    }
}